Relief Valve - is this acceptable?

John Shea

Please see the attached picture. I would like to simplify the operation by having one fitting plug) to unscrew as opposed to all the piping to the relief valve.

Thanks for your expertise.

Mad Dog

John, I'm not saying its never done or

that I have never done it, but it is not good practice, as something could become lodged and block the relieving water or steam's path. There's always another plug or tapping you can use. Mad Dog

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MIKE6

too easy

Just unscrew the pipe plug add chem and screw plug back on.this is to easy am i missing something?

Weezbo

while i have never done that.....

i dont see anythig especially wrong with the picture,...for the most part i would say the thing that would usually get you haggangued would be two 90's after the discharge.

Mad Dog

Yes, but to easy for chemical residue to build up too

I've seen it happen with MEX on Steam boilers...after I saw that, I stopped doing it. Mad Dog

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Mad Dog

My feeling is that the passage to relief

should be as direct and unmolested as possible. Mad Dog

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John Shea

Thanks all. I will look for another tapping...

but That will most likely be more trouble than it's worth. (I'm not equipped to handle most of the tapping sizes).

Here's an updated pic that may be a better design if someone chooses to pipe that way.

Firedragon_4

I like it, but

ASME says that the valve must be directly into the boiler! If all goes well, it's great, but................sorry, someone's gotta be the messenger.

BTW, most OEMs of boilers and valves could get out of hot water, excuse the pun, over that!!!! FACT.

Weezbo

Say.... no wonder i havent done that *~/:)

however i have added chemicals to a boiler that was piped that way, with a very long funnel.

Unknown

Is there a reason behind that ?

Maybe because they believe a 3/4 black tee will corrode shut if excessive water passes through it ? I wonder if they know that many relief valve bodies are made of cast iron .

What about if all brasss was used out of the top of the boiler ? Reason I ask is because we often combine the air elimination tapping with the relief valve on the Peerless series boiler .